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- Title
Laboratory evaluation of the termiticidal efficacy of copper HDO.
- Authors
Kim, Gyu-Hyeok; Hwang, Won-Joung; Yoshimura, Tsuyoshi; Imamura, Yuji
- Abstract
A laboratory no-choice termite bioassay was conducted to evaluate the ability of copper HDO (CX-A or copper xyligen) to protect radiata pine ( Pinus radiata D. Don) wood samples from attack by two subterranean termite species, Reticulitermes speratus and Coptotermes formosanus. A series of sapwood samples were pressure treated with either 0.25%, 0.50%, 0.75%, or 1.00% copper HDO solution. Samples treated with equivalent concentrations of a benchmark preservative, CCA-C, were used as treated controls. All samples (including controls) were subjected to an artificial weathering schedule before the bioassay. The samples were exposed to 30-day R. speratus tests and 3-week C. formosanus tests. Copper HDO was shown to deter termites from significant feeding on the treated wood. At a retention of 5.8 kg/m3 (treated with 0.75% solution) or higher, the mass loss from termite feeding did not exceed 3% for both the 30-day R. speratus tests and the 3-week C. formosanus tests. At each of the retentions tested, copper HDO performed comparably with equivalent retentions of CCA-C; however, field data are needed to validate these laboratory results. The preliminary findings are that copper HDO pressure treatment has potential as a viable method of protecting wood from attack by both termite species tested.
- Subjects
WOOD preservatives; TERMITES; INSECTICIDES; RETICULITERMES; SAPWOOD
- Publication
Journal of Wood Science, 2010, Vol 56, Issue 2, p166
- ISSN
1435-0211
- Publication type
Article
- DOI
10.1007/s10086-009-1072-y